Sil-fos™5 is used to braze copper and copper alloys. When brazing copper the phosphorus within the alloy imparts a metallurgical based self-fluxing capability. When Sil-fos™5 is used to join copper alloys (such as brass, bronze or gun metal) a separate flux will be required because the self-fluxing action only occurs on copper.

This filler metal should not be used to braze iron containing materials like carbon or stainless steels or nickel containing materials as the phosphorus within the filler metal will form brittle, intermetallic, phosphide compounds, at the joint interface. Sil-fos™5 is not suitable for use in sulfurous atmospheres at elevated service temperatures.

Phosphorus is the key element, the higher this is the more free flowing the filler metal, but the lower its ductility. Silver is used to improve the filler metal’s ductility, but reduces its flow properties. Sil-fos™5 provides the best combination of flow and ductility of all the silver-copper-phosphorus type brazing filler metals.

The optimum joint gap for brazing is normally 0.05-0.2mm.

Sil-fos™5 is extensively used in refrigeration, air conditioning and heat-exchanger components for flux-free brazing of copper pipes and tubes. It is also used for joining copper in electrical engineering applications.

Some of the values displayed above may have been converted from their original units and/or rounded in order to
display the information in a consistent format. Users requiring more precise data for scientific or engineering
calculations can click on the property value to see the original value as well as raw conversions to equivalent units.
We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding
error. We also ask that you refer to MatWeb's terms of use regarding this information.
Click here to view
all the property values for this datasheet as they were originally entered into MatWeb.

The contents of this web site, the MatWeb logo, and "MatWeb" are Copyright 1996-2020
by MatWeb, LLC. MatWeb is intended for personal, non-commercial use. The contents, results, and technical data from this site
may not be reproduced either electronically, photographically or substantively without permission from MatWeb, LLC.